set column width bootstrap code example
Example: bootstrap change column width
.col-sm-3half, .col-sm-8half {
position: relative;
min-height: 1px;
padding-right: 15px;
padding-left: 15px;
}
@media (min-width: 768px) {
.col-sm-3half, .col-sm-8half {
float: left;
}
.col-sm-3half {
width: 29.16666667%;
}
.col-sm-8half {
width: 70.83333333%;
}
}